MTU429B Datasheet, PDF (1/20 Pages) List of Unclassifed Manufacturers – 4-Bit Micro-Controller with LCD Dr

MYSON
TECHNOLOGY
MTU429B
(Preliminary)
4-Bit Micro-Controller with LCD Driver
FEATURES
• Low power and low voltage operation.
• Powerful instruction set (150 instructions).
• Memory capacity.
- Instruction ROM capacity 4096 x 16 bits.
- Index ROM capacity
256 x 8 bits.
- Internal RAM capacity 384 or 256 x 4 bits.
• Input/Output ports of up to 20 pins.
• 8-level subroutine nesting.
• Built-in LCD driver, 8 x 42 = 336 segments.
• Built-in EL driver, frequency or melody generator.
• Built-in Resistance-to-Frequency Converter.
• Built-in 2-channel 6/8-bit PWM output.
• Built-in key strobe function.(Shared with segment
pin)
• Built-in voltage doubler, halver, tripler quadrupler
charge pump circuit.
• Two 6-bit programmable timers with programma-
ble clock source.
• Watchdog timer.
• 4 external & 3 internal interrupt resources.
- External: INT, RFC, IOA/IOC/S port, keystrobe.
- Internal: TM1, TM2, Predivider.
• Dual clock operation.
• HALT and STOP function.
GENERAL DESCRIPTION
The MTU429B is an embedded high performance
4-bit microcomputer with an on-chip LCD driver. It
contains all the necessary functions in a single chip:
4-bit parallel processing ALU, ROM, RAM, I/O ports,
timer, clock generator, dual clock, RFC, EL-light,
LCD driver, look-up table, watchdog timer and key-
board scanning. The instruction set includes not only
4-bit operation and manipulation instructions but also
various conditional branch instructions and LCD
driver data transfer instructions which are powerful
and easy to use.
The Halt function stops any internal operations
other than the oscillator, divider and LCD driver in
order to minimize the power dissipation.
The Stop function stops all the clocks in the chip.
BLOCK DIAGRAM
SEG35~SEG38 SEG31~SEG34 SEG39~SEG42 SEG27~SEG30 COM1~8
...
IOA PORT
/RFC
IOB PORT
/EL, BZ
IOC PORT
/KEY IN
IOD PORT
/PWM
SEG1~SEG26
...................
LCD DRIVER
VDD1~4
SEGMENT PLA
FREQUENCY
GENERATOR
TABLE ROM
INDEX SRAM
ALU
256 X 8
256 X 4
SRAM
128 X 4
CUP1
CUP2
CUP3
PREDIVIDER
2 X 6 BITS
PRESET TIMER
8-LEVEL STACK
INSTRUCTION
DECODER
WATCHDOG
TIMER
OSCILLATOR
CONTROL
CIRCUIT
12-BIT
PROGRAM
COUNTER
MASK ROM
4096 X 16
XTIN CFIN
PRESET INT
XTOUT CFOUT
S1~S4
This datasheet contains new product information. Myson Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this procuts. No rights under any patent accompany the sales of the product.
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MTU429B Revision 3.0 28/Oct/1999